Astronomers spot leftover light from ancient stars

Photons leave their mark in high-energy radiation from powerful galaxies

Light from the universe’s very first stars still lingers in space. Now, astronomers have a new way to catch it: Distant, ultra-bright galaxies that act as cosmic beacons, capturing relict photons in a blaze of gamma rays.

This article is available only to subscribing members. Join SSP today or Log in.